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u/dead_space_doug

Needle hub dead space eats 2–5 units per draw. Budget for it.

member · joined 9 Apr 2024

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Comments — page 3 of 3

comment on the food noise question that gets asked weekly, answered properly in c/semaglutide · 1 points · 1 year ago

Genuine question — is the appetite effect still there, or is it just the scale that has paused?

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comment on [Question] area percent — what am I missing here in c/coa · 114 points · 1 year ago

a certificate with no method line is decorative

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comment on [Lab] 9th independent test on QYB — 97.7% on a claimed 97.0%, and the trend is the interesting part in c/retatrutide · 35 points · 1 year ago

Agreed, and the glucagon arm is exactly why the comparison threads do not work.

Disagree with this specific inference. A 48-week readout does not tell you the shape of the curve after it.

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comment on [Question] is 99.0% actually fine or am I being sold a rounding error in c/coa · 75 points · 1 year ago

batch number, date of analysis, method, individual impurities — that is the minimum set

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comment on [PSA] area percent is not what most of this community thinks it is in c/coa · 1 points · 1 year ago

Area percent is the peak area of your compound over the total integrated area, at one wavelength, on one gradient. It is a relative measure of what the detector saw, not a mass fraction of the vial.

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comment on [Meta] proposal — a flair for Ozempic posts in c/semaglutide · 16 points · 1 year ago

Week 17: 3kg down, food noise basically gone since about week 9, and the honest headline is that nothing dramatic happened. It was boring and it worked.

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comment on the LC-MS question that gets asked weekly, answered properly in c/hplc · 180 points · 1 year ago

Can you post the trace with the axes labelled?

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comment on [Discussion] the purity advice in here is 3 years out of date in c/coa · 279 points · 1 year ago

Asked KP for the batch-specific certificate and had the full document — batch, date, method line naming the column — inside six hours. That is now my baseline for everybody.

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comment on [Question] is 98.1% actually fine or am I being sold a rounding error in c/hplc · 44 points · 1 year ago

That figure cannot be quoted to two decimals off that baseline. The precision is not in the data.

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comment on unpopular opinion: most of what gets said here about certificate of analysis is guesswork in c/coa · 167 points · 1 year ago

Small fix — 214nm, not 280nm. It matters here because the impurity you are asking about barely absorbs at the longer wavelength.

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comment on three years of COA threads, summarised so you do not have to read them in c/coa · 4 points · 1 year ago

Agreed on asking for the storage condition. It is one line and it changes how you read the entire stability claim.

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comment on am I the only one who found triple agonist harder than the injections in c/retatrutide · 45 points · 1 year ago

That is body weight change, not fat mass. The trials report the first and people quote it as the second.

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comment on the chargeback thing finally clicked for me and I want to write it down in c/cryptopay · 2 points · 1 year ago

The transaction hash is the canonical receipt: it is public, verifiable by either party, and it is what a support query should quote.

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comment on why does nobody talk about water content in c/coa · 119 points · 1 year ago

redact your own name, never the batch details

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comment on the UK: network, and what it actually costs here in c/cryptopay · 113 points · 1 year ago

A test transaction costs one extra network fee and verifies the address, the network and the recipient’s crediting process before the main amount moves.

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comment on anyone else notice weekly dosing kicking in around week 33 in c/semaglutide · 659 points · 1 year ago

Careful. A four-week stall is inside normal variation and treating it as failure is how people escalate for no reason.

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comment on my ferritin moved and I cannot work out whether tracking is why in c/dosinglogs · 167 points · 1 year ago

Same. Waist monthly was the column I added late and wish I had started with.

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comment on [Lab] MKM cagri — Medutest came back 97.2% against a claimed 97.0% in c/hplc · 88 points · 1 year ago

the column has a history and it shows in the peak shape

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comment on [Lab] split one vial across Janoshik and Medutest — 98.1% and 97.6% in c/coa · 4 points · 1 year ago

batch number, date of analysis, method, individual impurities — that is the minimum set

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comment on [Question] triple agonist — what am I missing here in c/retatrutide · -35 points · 1 year ago

Which phase 2 arm are you quoting, and at what week?

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comment on three years of water content threads, summarised so you do not have to read them in c/coa · 86 points · 1 year ago

Did you get the chromatogram or only the summary line?

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comment on reading chromatogram threads from 2024 and half of it aged badly in c/hplc · 17 points · 1 year ago

Bought a second-hand instrument and learned more in six months of fixing it than in three years of reading traces.

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comment on reading chromatogram threads from 2024 and half of it aged badly in c/hplc · 29 points · 1 year ago

Same method at both labs, or two different gradients?

Disagreeing with this bit: that spread is ordinary inter-lab variance, not a disagreement about the material.

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comment on [Meta] the area percent rule is doing its job and people should stop complaining in c/coa · 25 points · 1 year ago

ask for the storage condition the stability statement was written against

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comment on [Discussion] can we stop arguing about purity until somebody posts a number in c/coa · 151 points · 2 years ago

Right, and net peptide content is where the counterion and the water go. Both numbers can be honest and very different.

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comment on [Lab] split one vial across Janoshik and Medutest — 95.1% and 99.3% in c/retatrutide · 1 points · 2 years ago

nothing here is available as a prescription product, so read every thread with that in mind

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comment on [Lab] split one vial across Janoshik and Medutest — 95.1% and 99.3% in c/retatrutide · 55 points · 2 years ago

Is that the 48-week figure or an earlier readout?

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comment on [Lab] split one vial across Janoshik and Medutest — 95.1% and 99.3% in c/retatrutide · 182 points · 2 years ago

What is the source for that figure — the published paper or a summary of it?

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comment on [Question] how do you actually verify weekly update in c/dosinglogs · 64 points · 2 years ago

Logged the missed weeks as blanks rather than skipping them. The gaps turned out to be the informative part.

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comment on stalled for 7 weeks at 10mg and I refuse to panic this time in c/retatrutide · 0 points · 2 years ago

Same read.

This is the sentence the rest of the board should read first. Phase 2 is not a label.

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comment on [Discussion] we are measuring network at the wrong time and calling it noise in c/cryptopay · 42 points · 2 years ago

the memo field matters on the chains that use one

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comment on someone explain phase 2 to me like I have not read a paper in years in c/retatrutide · 18 points · 2 years ago

Went up slowly, deliberately, because everything on this board says the escalation is where trouble lives. Uneventful so far and I am not going to pretend that is a finding.

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comment on someone explain phase 2 to me like I have not read a paper in years in c/retatrutide · 36 points · 2 years ago

Has anyone posted an independent test on this compound recently?

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comment on someone explain phase 2 to me like I have not read a paper in years in c/retatrutide · 304 points · 2 years ago

the glucagon component is why the metabolic story reads differently

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comment on [Discussion] the crypto advice in here is 2 years out of date in c/cryptopay · 112 points · 2 years ago

gas is not the supplier’s fee

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comment on [Question] purity — what am I missing here in c/coa · 44 points · 2 years ago

Water content 3.8%, acetate 6.2%, purity 99%, net peptide about 90% of label weight. All four numbers honest, and I had to read it twice.

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comment on [Results] 26 weeks, 5kg, and dose escalation was the hard part in c/retatrutide · 229 points · 2 years ago

Read the phase 2 paper twice before ordering anything. Recommend that to anyone in this board: the error bars are the interesting part.

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comment on small win: plateau stopped being a problem at week 28 in c/semaglutide · 23 points · 2 years ago

Disagree. 2.4 is the top of the label, not the goal, and "everyone ends up there" is just survivorship in the posts you read.

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comment on [Lab] ERP cagri — PeptideMeter came back 98.8% against a claimed 98.0% in c/hplc · 447 points · 2 years ago

That is area percent, not mass percent. The trace cannot give you the second one.

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comment on [Lab] KP cagri — VendorInvestigate came back 98.1% against a claimed 97.5% in c/hplc · 15 points · 2 years ago

Gave the same trace to two people I trust and got two integrations about a point apart. That was the most educational afternoon I have had here.

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